Electric-light stand.



R. D. H. ANDERSON.

ELECTRIC LIGHT STAND.

APPLICATION FILED AUG. 13. 1M5.

Patented Apr. 11mm.

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ELECTRIC LIGHT STAND.

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R. D. H. ANDERSON. ELECTRIC LIGHT STAND. APPLICATION FILED AUG. 13. I915.

Patented Apr. 17,1917.

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ROBERT D. H. ANDERSON, OF BOSTON, MASSACHUSETTS, ASSIGNOR T0 FRANK RIDLON COMPANY, OF BOSTON, MASSACHUSETTS, A

CORPORATION OF MASSACHUSETTS.

ELECTRIC-LIGHT STAND.

Specification of Letters Patent.

Patented Apr. 317, 19ft.

Application filed August 13, 1915. Serial No. 45,343.

To all whom it may concern:

Be it known that I. ROBERT D. H. ANDER- SON, of Boston, in the county of Suffolk and State of Massachusetts, a citizen of the United States, have invented a new and useful Improvement in Electric-Light Stands, of which the following is a specification.

My invention relates to a stand for electric lighting and is more especially constructed for use in photographic work where considerable adjustment is required and where the socket mechanism for the lamps is quite large and heavy. The details of my invention comprise chiefly a combined clamp and adjusting device whereby the height of the stand may be adjusted and clamped in place when in proper position, and the direction in which the light is thrown may be changed.

My invention will be understood by reference to the drawings, in which- Figure 1 is an elevation of a stand embodying my invention.

Fig. 2 is a section showing the adjusting and clamping mechanism.

Fig. 3 is asection on the line 33 of Fig. 2.

Fig. 4. is a top view of the adjusting and clamping mechanism, the top of the housing being removed.

Fig 5 is a vertical section of the lower part of the stand.

Fig. 6 is a top view of the mechanism for adjusting the lamp wit-h relation to the object. I

Fig. 7 is a section on the line 77 of Fig. 6. V

Fig. 8 is a section on the line 88 of Fig. 9 showing an arrangement of clamps where three heads or sets of lights are to be used, each being separately adjustable.

Fig. 9 is a side elevation of a mechanism shown in Fig. 8.

Figs. 10 and 11 are modifications of the lifting mechanism.

A is a base supported on casters a or otherwise, and having a socket A at its upper end and in which sets a sleeve B held in place by a set screw a Within this sleeve the lamps inclosed in it being of ordinary construction, need not be further described.

The cable to supply current is shown'at e and passes up through the tube C to the lamps. At C is shown the casing of an ordinary electric switch which need not be described further as it is common in the art. The cable is connected to the terminals of the switch C in the ordinary way so as to control the light at E.

The main purpose of my invention is to simplify the raising and lowering of this tube C so as to raise or lower the lamps within the shade E. For this purpose I have provided a housing F which is attached by a set screw 7) to the upper end of the sleeve B. Vithin this housing is journaled a shaft carrying a roll G which is preferably shaped as shown (see especially Fig. 4) so as to have a considerable bearing upon the outer surface of the tube C. The shaft terminates in a crank G so that by turning the crank in either direction the roll G will be turned in a direction to raise or lower the tube 0 as the case may be. To cause the motion of the tube C to be in a right line the tube is grooved as at c and .a pin 7* is passed through the housing F and is adjusted to lie in this groove so as toprevent the tube C from turning. Means should also be provided to keep the tube in proper frictional relation to the roll G. For this purpose I prefer to provide on the opposite side of the housing F from the roll G a set screw it which is adapted to engage a carriage H located within the housing and having two rolls H H each in shape like the roll G but smaller, each being thus adapted to have considerable bearing surface on the tube G. This carriage has a center 7& upon which the end of the screw 72, bears to keep the carriage in place, and the screw has a handle 7& by which it may be turned. The function of this carriage is two-fold. Upon applying pressure thereto by means of the screw it the screw it may be given a further turn so I cable 6 sufficiently long for all possible contingencies, and I provide the base with a flooring a on which the surplus of cable may rest.

When therefore (presuming this standard to be used for photographic purposes) it is desired to change the height of the lights it it is only necessary to turn the roll G in either direction to raise or lower the tube C as the case may be.

In the adjustment of such a light it is often necessary that it be turned to throw the light either up or down, and it may be desirable to throw it to one side or the other. For this purpose I have provided the cou pling D which is shown in detail in Figs. 6 and 7, and as to some of-its features is described in Letters Patent of the United States No. 1,077,663, dated November 4, 1913.

. other member bears.

Uponthe upper end of the tube 0, which is preferably bent at its upper end into a horizontal position, I attach by a threaded neck a saucer-shaped member J. This member has a threaded opening through its center and into that opening is carried a short sleeve or hollow bolt 9' threaded at each end, its middle portion being smooth. Onto the smooth portion of this sleeve is slipped a bracket member J which carries a saucer-shaped member J which engages the member J so that a cavity is formed between the members J and J The rim, so to speak, of each of these saucers is beveled so that a narrow bearing surface is provided in. each member against which the The bracket J 2 is capable of rotation around the sleeve j and may be clamped against the member J by nuts j which are screwed onto the outer threaded end of the sleeve j. By this means an adjustment around the axis of this portion of the tube 0 may be effected, the contacting surfaces of the parts J and J being quite narrow and smooth so that the art J 2 may slide against the part J wit out difficulty when the nuts 3' are loosened.

The bracket J 2 is provided with a second similar saucer-shaped portion J a which lies at right angles to the portion J and has an opening i through it so that the cable e may be led through this opening- A cover J 4 similarly shaped is attached to the memberJ by a bolt 7' and nut 9' and carries a threaded neck J to which the socket or sockets may be attached and out through which the cable passes to sockets, this neck being hollow as shown and threaded on the exterior for this purpose. The contacting edges of J 3 and J are. also narrow and smooth so that one may turn on the other and so adjust the direction in which the A number of these lamps may be mounted on the same standard, and I have shown in Figs. 8 and 9 a construction where three lamps are mounted about the central sleeve B in the manner above described. The only modification necessary in the construction described above, to apply three sets of adjustin'g mechanism and clamps in this case, is in the shape of the housing which I have marked F the cover being F f in Fig. 8 showing the screw holes by which the cover F is attached to the housing. In this case, however, but one sleeve B is used, the tubes G being carried outside the sleeve B instead of inside it, as in the case where a single lamp is used. The cables in this case pass up through suitable openings in %he base A and through the tubes G as beore.

It will be evident that the tube may be raised and lowered in other ways than that above described. For example, in'Fig. 10 the housing, marked in this case F is differently shaped and the roll in this case is shown as a sprocket Gr around which passes a sprocket chain 9 which is attached to a collar 9 clamped to the bottom of the tube C. The wire cable is not shown in this view, but passes as before from the base A up through the tube. A crank G is attached to the axle g of the sprocket G and after the proper adjustment is made the crank handle may be locked in any convenient way. In this view, however, as well as in Fig. 11, instead of applying a lock to the crank directly I slot the housing as at F through the bearing for the shaft 9 and provide a thumb-screw g by which the two sides of this slot may be brought together to clamp the shaft. F is the top of the housing which as before is attached to the housing by screws P.

In Fig. 11 another modification is shown in which instead of a sprocket G a pinion G is in like manner mounted on a shaft 9 in a housing F provided with a top or cover F attached thereto by screws F. The tube in this case is provided with a rack g with which the pinion G3 engages. In this case also a crank and handle G is attached to the shaft 9 of the pinion G In both of these cases the sleeve is attached to the base by screws a and the housing is attached to the top of the sleeve B by screws 6 In each case the tube 0 may be grooved as at c and a pinmay be provided so that the tube 0 will be moved in a right line. The clamping mechanism is as shown in Fig. 10, this clamping mechanism being applicable to the devices of the other views if desired.

It is evident that my invention may be embodied in other ways, its purpose being to provide a simple and easy means of raising, lowering and clamping the light supports comprising the tubes C so that t e height .of the lamp or lamps may be easily adjusted and will not easily get out of adjustment, my invention also comprising means for adjusting the angle of the lam s to the object upon which light is to thrown.

It is to be understood of course that in the forms of my invention shown in Figs. 8, 9, 10 and 11 the lamp is to be supported as shown in the other figures or in some equivalent way so that their adjustment may be easily accomplished.

lVhat I claim as my invention is 1. In a device of the kind described, a standardcomprising a sleeve, a hollow sliding member movable in said sleeve and carrying a lamp socket at its upper end, electric connections leading to said lamp sockets, and means to raise and lower said sliding member and to automatically lock the same, said means comprising adjustable friction rollers adapted to engage said sliding member.

2. In a device of the kind described, a standard comprising a sleeve, a hollow sliding member movable in said sleeve and carrying a lamp socket at its upper end, electric connections leading to said lamp sockets, and means for raising and lowering ing member movable in said sleeve and carrying a lamp socket at its upper end, electric connections leading to said lamp sockets, and means for adjusting the height of.

said lamp sockets mounted on said sleeve and comprising a roller and means for supporting it in fixed position, and means ad- .justable with relation thereto adapted to engage said sliding member and force it into contact with said roller,'said means comprising a carriage having rolls adapted to engage the sliding member on the side opposite said roller and means for adjusting said carriage radially to said sliding member, and means for rotating said roller.

5. In a device of the kind described, a hollow standard, a lamp holder and means for supporting said lamp holder on sa1d standard comprising a member having a neck adapted for attachment to said standard, a hollow sleeve threaded into said member, said sleeve having a portion of its periphery smooth, a second member adapted to turn upon the smoth portion of said sleeye and means for confining it thereon, sa1d members being in frictional contact whereby the second member may be turned about said sleeve as an axis, said second member carrying a bracket and a member having a 011- cular bearing, a rotatable member having a complementary bearing adapted to engage with said circular bearing and having a hollow neck whereby a lamp socket may be attached thereto, said supporting means as a Whole being hollow whereby a cable may be threaded through it from said standard to said lamp socket.

ROBERT D. H. ANDERSON.

Witnesses:

BLANCHE MAGMIILAN, LEILA M. KING. 

